Original documents and papers generated by William J. Hammer and by various companies and individuals with whom he was associated. Includes material related to the research and inventions of Edison, Bell, Tesla, the Curies, etc.

A New York bookseller, Warshaw assembled this collection over nearly fifty years. The Warshaw Collection of Business Americana: Railroads forms part of the Warshaw Collection of Business Americana, Subseries 1.1: Subject Categories. The Subject Categories subseries is divided into 470 subject categories based on those created by Mr. Warshaw. These subject categories include topical subjects, types or forms of material, people, organizations, historical events, and other categories. An overview to the entire Warshaw collection is available here: Warshaw Collection of Business Americana

The Balcomb and Gertrude Greene papers, circa 1880s-2009, bulk circa 1905-1990, measure 9.8 linear feet. Balcomb Greene's career as a painter, educator, and writer - and to a lesser extent his personal life - is documented by biographical material, letters, subject files,writings, artwork, audio-visual recordings, printed material, and photographs. Documentation about sculptor Gertrude Greene, from 1926 until her death in 1956, consists of printed material, photographs, two letters to her, and a brief handwritten list of paintings and constructions.

Papers documenting the farming and family life of the Robinson family of Prince George's County and after 1975, Charles County, Maryland. Papers documenting the farming and family of the Via family of Greene County, Virginia, Washington, D.C., Prince George's and Calvert Counties, Maryland, by 1949.

The collection includes approximately 250,000 photonegatives, photoprints, color transparencies from the photographic business founded by Addison Scurlock in Washington, D.C. Collection also includes business records and ephemera.

The International Sweethearts of Rhythm Collection focuses on the all-female, racially and ethnically diverse big band group that started in 1937 and disbanded in 1949. The collection contains news clippings, photographs, correspondence, ephemera from USO travels, and newsletters. Also included are books related to the group, as well as a tribute CD and a 33 rpm vinyl sound recording.

The scattered records of the New York contemporary American art Eva Lee Gallery measure 4.0 linear feet and date from 1921-1973. Artist files contain provenance notes, photographs of artwork, records of sales and consignments, exhibition catalogs from other galleries, and reference information on numerous contemporary artists, many represented by the gallery. There are also scattered letters and artwork from artists, scattered sales records of J.B. Neuman's New Art Circle Gallery, and a photocopy of an auction catalog for Korvettes Art Galleries in Douglastan, New York. A significant amount of information is found within the collection about Alexander Calder, Lovis Corinth, Salvadore Dali, Lyonel Feininger, George Grosz, Robert Indiana, Harry Lieberman, Rene Magritte, John Marin, Lowell Nesbitt, Ben Shahn, Victor Vasarely, and Max Weber.

This collection consists of ephemeral materials gathered by Sally L. Steinberg while she was researching her 1987 publication, The Donut Book: The origins, history, literature, lore, taste, etiquette, traditions, techniques, varieties, mathematics, mythology, commerce, philosophy, cuisine, and glory of the donut.

The John K. Parlett Collection of Agricultural Ephemera, 1859-2011, undated, is a collection of operator's instruction manuals, parts illustrations manuals, dealership materials, farming, farm life, and agriculture-related ephemera. The material is from national companies as well as local manufacturers and businesses.

The papers of painter Abraham Walkowitz date from 1904-1969, and measure 2.9 linear feet. Found within the papers are biographical material; letters from artists, friends, and art collectors; business records; four interview transcripts; notes and writings; exhibition announcements, cataloges, and other printed material; and photographs of Walkowitz, friends, colleagues, and artworks.